Furnace-chamber



(No Model.) S

' E. W. WELLS.

FURNACE CHAMBER.

1355 32" fixzremmzs Lilhogmpher, Washington. D. C

Niih STATES PATENT FFICE...

EDWARD XVALTER ELLS, OF OSKALOOSA, IOWA.

FURNACE-CHAMBER.

SPECIFICATION forming part of Letters Patent No. 21,998, dated February25, 1890. Application filed June 21, 1889. Serial No. 315,035. (Nomodel.)

T0 at whom it may concern.-

Be it known that I, EDWARD VALTER lVELLs, a citizen of the UnitedStates, residing at Oskaloosa, in the county of Mahaska and State ofIowa, have invented certain new and useful Improvements inFurnace-Chambers; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention has especial reference to the construction and arrangementof a hot-air chamber for portable furnaces, although it could be usedfor other kinds.

The object of my device is to keep up a constant circulation of freshair in the rooms supplied with heat, to utilize the heat to its fullestcapacity, to provide means for taking the air away from a sickroomwithout vitiating the air in the other rooms, and to purify and moistenthe air.

With these ends in view my invention consists in the peculiar featuresand combinations of parts more fully described hereinaf-' ter, andpointed out in the claims.

In the accompanying drawings, Figure 1 represents a side elevation incross-section, and Fig. 2 an end view with the back wall removed.

The reference letter a denotes the interior of the heating or hot airchamber, which is composed of the top end, and side walls Z), c, d, ande, respectively. These are what may be termed double walls, eachconsisting of an outer and inner sheet f and g, arranged to leave aspace between them to prevent the heat from radiating from the exteriorof the chamber and into the room where the furnace is placed. The topwall is provided with a shoulder h, formed by bending up the lower sheetf, which operation leaves an overlapping flange 2', to rest upon the topof the side walls e and form a lap-joint. Theinner sheet of the endwalls 0 is bent outwardly over the edges of the outer sheet c, to form aflange 7c along the top for the purpose of enabling the flange to besecured to the flange 71: by means of bolts or rivets Z. The lower edgesof the side walls rest in sockets or grooves 012-, formed around theupper edges of the hollow base a, and thus make a dust-tight der toelevate the bottom of the heater fromthe floor, and the base ispreferably composed of sheet metal with air-tight j ointsto excludenoxious. gases which might arise from the ground or floor of thefurnace-room.

A damper-box 0 is located at the rear of the hot-air chamber a andcontains the dampers p, which have their lower ends pivoted below themouth of the outlet-flue q, to close the latter when the dampers areraised. An inclined plate 0 is placed diagonally across the dampenboxand is provided with openings p. This plate formsa seat for the damperswhen they are closed over the openings 19. The damper-box is provided.with vertical partitions g, which divide it into three compartments 0',so that when there are three return-pipes each one has its own damper.The partitions extend from the top of the damper-box down to the plate0', but below the plate there are no partitions. By this arrangement thedampers are made to serve the double purpose of returning the hot air tothe chambers a or directing it out of the chimney, as will be explainedhereinafter. In the upper part of the damper-box a waterpan 8 rests uponan open grate i, so that the downflowing air will come in contact withthe water in the pan to purify and moisten it, and a similarpan u isplaced upon grate-bars 1) below the valve, to still further purify andmoisten the air. A foul-air flue M), which comprises the lower portionof the side walls 6, is provided with perforations 0c, and this fine ismade to communicate with the chimney g by way of the diagonal flues z,the transverse flue A, and outlet-flue B. Arrows 1 show the course thefoul air pursues, and arrows 2 that of the pure air. Fresh air issupplied to the chamber through the flue O, which enters the base. Thehot air passes out of the chamber through an uptake-flue E, extendingout of the top of the chamber and into the room above, and is drawn offby a downtake-flue F, which communicates with the top of the damper-box0. The arrows represent the course pursued by the hot air.

It is apparent-from the foregoing description that the fresh air afterentering through the flue 0 passes into the hot-air chamber a, Where itis heated by the furnace, and from this chamber it passes into the roomor rooms I above through the offtake-fiue E. After having circulatedaround the room itis drawn off by the downtake-pipe F, and entering thedamper-box 0 it comes in contact with the water-pan s. If the damper pis thrown back, as shown in full lines in Fig. 1, the air will flow ondown to the opening H, where it will be directed again into the hot-airchamber, but the impure heavier portion, which is laden with carbonicgas, will pass out through the perforations in the side walls e, andthence to the chimney J by way of the diagonal fiues z, transverse fluesA, and outlet-flue B. In this way the impure portion of the air iseliminated, while the purer portion is again utilized. IVhen, however,the hot air passes through a sick-room and it is not desirable to haveit again enter the hot-air chamber, then the damper p is turned down, asshown in dotted lines, and the air passes out to the chimney through theoutlet-flue B.

The advantages of my device are that a constant circulation is kept up,a large percentage of the heat which would otherwise be lost by passingdirectly out of the chimney is saved by using the pure portion of theair over again, and the vitiated air from a sickroom may be passeddirectly out of the chimney and entirely out off from the other parts ofthe house.

It is evident that my invention could be changed in many slight wayswhich might suggest themselves to a skilled mechanic. Therefore I do notlimit myself to the exact construction herein shown; but,

Having thus described my invention, what I claim as new, and desire tosecure by Let ters Patent, is-

1. In a hot-air chamber for furnaces, the combination of an offtake-fluecommunicating with its interior, a damper-box located upon the outsideof the chamber and provided with an opening leading into the lower partof said chamber, a downtake-flue communicating with the upper part ofthe damper-box, an outlet-flue connecting the boX with the chimney, anda damper pivoted to command the mouth of said outlet-flue and lowerportion of the box, in the manner and for the purpose substantially asset forth.

2. In a hotair chamber for furnaces, a take-off flue leading out of thehot-air chamber, in combination with a return-flue leading into saidchamber, and a damper-box provided with a damper interposed between thereturnflue and chamber, in the manner and for the purpose substantiallyas described.

3. In a hot-air chamber for furnaces, a take-off flue leading out ofsaid chamber, in combination with flues leading to the chimney and adamper commanding said fiues, whereby the escaping air may be directedup the chimney or returned to the hot-air chamber, in the manner and forthe purpose substantially as described.

4. In a hot-air chamber for furnaces, the combination of a take-off flueconnecting the hot-air chamber with the room to be heated, a return ordowntake flue connected with a damper-box located upon the outside ofsaid chamber, and awater-pan located within said box,in the manner andfor the purpose substantially as described. I

5. A hot-air chamber for furnaces, having its side and end walls hollowand provided with shoulders and flanges bent out of one of thewall-sheets and lap-joined together, in the manner and for the purposesubstantially as described.

6. The combination, in a hot-air chamber provided with an offtake-flue,of the hollow side and end walls, lap-joined as described, a fresh-airflue entering the base of the chamber, a damper-box located upon theoutside of the chamber, a return-flue leading into said box, the latterbeing connected with a flue leading into the chimney, said box having anopening leading into the lower part of the hot-air chamber, a valve commanding said outlet-flue and opening, water-pans located within thevalve-box, foul-air flues located along the lower part of thechamber-walls, and fines connecting them with the chimney, all arrangedand adapted to operate in the manner and for the purpose substantiallyas described.

7. In a hot-air chamber having the usual offtake-flue for conveying theheat to the apartments to be heated, a return-flue arranged to returnthe hot air from said compartment to the lower portion of said chamberfor reheating, in combination with a foulair flue arranged to carry offthe vitiated air, in the manner and for the purpose substantially asdescribed.

In testimony whereof I afiix my signature in presence of two witnesses.

EDWARD WALTER I/VELLS.

\Vitnesses:

J AMES A. RICE, W. R. CAMMACK.

